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Questions and Answers
Which form of phosphorus becomes yellow on exposure to air?
Which form of phosphorus becomes yellow on exposure to air?
- White phosphorus (correct)
- Amorphous phosphorus
- Red phosphorus
- Crystalline phosphorus
In which solvent is white phosphorus freely soluble?
In which solvent is white phosphorus freely soluble?
- Water
- Alcohol
- Carbon disulphide (correct)
- Phosphoric acid
What color do the fumes of white phosphorus glow with?
What color do the fumes of white phosphorus glow with?
- Blue
- Red
- Green
- Yellow (correct)
Which form of phosphorus is used on the side of a matchbox?
Which form of phosphorus is used on the side of a matchbox?
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What is the tip of a match stick made of?
What is the tip of a match stick made of?
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Study Notes
Phosphorus Forms and Properties
- Yellow phosphorus turns yellow upon exposure to air due to oxidation.
- White phosphorus is freely soluble in carbon disulfide.
- Fumes of white phosphorus emit a greenish glow in the dark.
Applications and Uses
- Red phosphorus is utilized on the side of matchboxes for strike-on packaging.
- The tip of a matchstick is made from a mixture of chemicals, typically including red phosphorus, sulfur, and binding agents for ignition upon friction.
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